Adding-machine.



C. 0. MAPEL.

ADDING MACHINE. APPLOATION FILED NOV. 23, 1905. RENEWED NOV. 15. 1909. 1,01 3, l 92. Patente@ Jan. 2, 1912.

2 SHEETS-SHEET l.

C. 0. MAPEL.

ADDING MACHINE. APPLIOATION FILED No1/12s, 1905. RENBWBD Nov. 15, 1909.

' 1,013,192. Patented .121112, 1912.

2 SHEETS-SHEET 2.

UNITED sTATEs PATENT orion.

CLARENCE O. MAPEL, OF CHICAGO, ILLINOIS, ASSIGNOR T0 BURROUGHS. ADBNG MACHINE COMPANY, 0F DETROIT, MICHIGAN, A

CORPORATION' 01E'l MICH'IGAN.

ADDING-MACHINE.

Specicaton of Lettersatent.

' Patented ano 2, 1912,

Application led November 23, 1905, Serial 110,288,714. Renewed November 15, 1969. Serial No. 523,146.

of that type or class adapted to print, li tand accumulate individual items and to print the total or footing of such lists at the will of the operator and the same has more particular relation to the printing mecha-v nism of an adding machine.

The object of my inventi the operation of the printing mechanism by the paper support or platen and to render such printing mechanism operative only when the paper support is in a position to receive the impression from the printing mechanism, such mechanismbeing rendered inoperative when the paper support is swung back to a non-printing position. The purpose of this control of the printing mechanism is to relieve or protect the type plates and prevent them' from being damaged or broken off from .their supports or sectors by the force of the blows of the-hammers imparted to such type plates at atime when the paper support is swung back and not in position to receive the impression from such type plates. It frequently happens that for one. reason or another, particularly when the machine is being cleared tor a fresh operation, adding machine operators throw back the .paper support vand leave it in such non-printing position during an operation or operations of the machine, with the result that nothing remains to receive the type impression so that the blow or the hammers upon the type plates is liable to knock such plates off their sectors or to damage the same. To overcome this diiiiculty, l providemeans which is dependent upon the positionof the paper support for controlling the action of the printing mechanism, such mechanism being rendered inoperative when the machine is thrown back, but lett operative when the paper support is in print-ing position, so that while the machine may be operated as before, to clear the machine or for any other reason, the printing mechanism is enabled to on is to control operate and the hammers enabled to deliver their blows 4only when the paper support is in position to receive the force of the impact and thereby relieve the type `plates from the full force of the'blows.

`In the present instance, I have shown my inventionas applied to and incorporated in the well known Burroughs adding machine, made in substantial 'accordance with Burroughs Patents Nes. ,504,963 and 505,078, issued on September 12, 1893, although as will be understood, my invention may be applied to adding machines of other styles and makes and constructed and operating in the same general way to accomplish the same general purposes.

Moreover, my invention may partake of other embodiments, lalthough the present and illustrated and hereinafter described construction is preferred and found satisfactory in practical use.

In the drawings, Figure 1 is an elevation of the left-hand side of a Burroughs adding machine showing those portions only thereof as are more or less directly concerned with a description and understanding of my invention; Fig. 2 a somewhat similar view ot the machine, but with the paper support or platen thrown back in non-printing po# sition; Fig. 3 a-plan view of the paper carriage or support and a portion of the ma'- chine proper; and Fig. 4 a detail view of a portion of the printing mechanism illustrating the'means Jfor controlling the latches 717.

inasmuch as the Burroughs adding machine is well known and also described in detail in the Burroughs patent aforesaid as to general features of construction and mode of operation, only those portions of in number to the number of denominations represented by the diiierent rows or banks ot keys on the keyboard.. These sectors are provided at their rearward ends with the series of type plates 6G18 which, in the present instance, are tive 1n number, each bearing two type so as to-present the nine digits and the cipher. As is well lmown, these type are mounted upon their sectors in such trolof the degreey of oscillation of the sec- 4thel control of its pa-wl 7.18. known, the

tors 611at their forward ends by operating connections under the control ofthe keys.

is Vwell known and described in said Burroughs patent so that detail vde escription thereofl isupnecessary here.

The printing mechanism of the Burroughs machine hereinA shown comprises a series of 'hammers 715 corresponding in number to the number of sectors 611 .and mounted` to oscillate on a cross shaft 701. These hammers are arranged to be operated or driven by a seriesof similar drivers 716 mounted upon the cross shaft 702, towhich end each driver is provided with a laterally .projecting stud 75,3 adaptedto be received by the slot 715a in its corresponding hammer, with the result that when the driver .716 -which in the operation of the machine is placed under tension of the spring 780, one for eachdriver, and after such drivers have been trip ed in a manner hereinafter explained, the ammers are caused to move rearwardly to deliver their blowsupon the particular type plates which 'happen to be presented to them, according to the particular 'elevation of the operated sectors-l 611. -Each driver 716 is associated with a latch A717 and'each latch is in turn under As is Well awls 718 have no eifect upon their latches 1n case the sectors 611 have not been elevated,'o wing tothe contact ofthe tails of such pawls upon the inclined shoulder 611a of such sectors, Abut in case any oneor more of the sectors are elevated the interference to the tails of those pawls 718 corresponding to s uch operated sectors is removed, with the result that in the usual forward swinging of the entire seriesy of pawls 718 those particular pawls, that is the pawls corresponding to the operated sectors, will engage their respective latches 717 and rock the same in a clockwise direction, Figs. 1 anda2, and thereby release their drivers and operate the hammers. The drivers and consequently the hammers are normally held retracted .by a bail such as shown-in the above-mentioned Burroughs Patent 505,078, said bail-comprising side arms 712 and a connecting rod 757 overlying the for- Wardly projecting arms of the drivers. This bail is connected through the medium of a link 820 with a crank plate 823 secured to the rock-shaft 800. The latter is oscillated in the usual manner in each operation of vthe machine. At the outset of an operation the bail above described is lifted and the hammer drivers and hammers thus relieved from the restraint normally imposed by said bail.l Hence when latches are thereafter tripped the hammers pertaining to,

them can be projected against the type by the springs 780 with a percussive eiiiect. It will of course be -understood that the above described bail serves the purpose of retracting the hammer drivers and hammers as an operation, of the machine is broughtv to a close. LAs is Well understood, the transfer of hammer action for cipher printing is accomplishedby means of the series 'of tails d on the latches 717, as indicated in Fig. 4 and as describedin the Burroughs patents aforesaid.

Ordinarily the printing mechanism would operate, that is the hammers would deliverI their blows upon the type plates, when an item was being put into the machine or a total being taken, regardless ofwhether the paper support or4 platen was -in printing position or not, lbut in order to bring such printing mechanism under the control of the paper support so that the position of the latter shall determine whether the printing action occurs Aor not, I provide mechanism for interfering with the usual operation of the latches causing the same to be automatlically tripped or released from their drivers at the instant when the paper support is raised or tilted back,.as shown\ in Fig. 2. With the latches thus disabled it will be seen lthat the hammers will be permitted to fall or move rearwardly as'the 'bail 712- 7 57 rises and there can be no percussive action such as'essential to a printing impression. Under the present construction, the means which I have provided to accomplish the desired results normally tends to render the printing mechanism inoperative by trip-` ping such latches and the same is operated by the act of restoringfthe papersupport to its printing position', with the result that immediately ,upon tiltingback the paper support said means instantly renders the printing mechanism inoperative. Referring more particularly to Fig. 2, I provide at a 'point adjacent the tails of the latches 717 a transverse rock shaft A which may be conveniently described as half-round, inasmuch as one halt` thereof has been cut away, or one side thereof has been at least reduced.' The ends 'of this rock lshaft are suitably journaled inthe side plates 710R in which platen frame and 710L of the framcof the printing mechanism. When the reduced side of this rock shaft is presented toward the tail of the latches 717, such rock shaft has no el'ect upon such latches, but when such shaft is rocked so as to present its full side or diameter to such latches all of the 'latches will be rocked downwardly as to their forward ends, while their rearward ends will be rocked upwardly to thereby .release these latches from engagement with, the drivers 716, as shown in Fig. 2, at which time no hammer action can take place. For the purpose of placing this roel; shaft under the control of the paper support I provide suitable operating connect-ions which, in the present instance, comprise a crank arm ,a connected with the rock'shaf-t A which is in turn connected by the'link a1 with the bell crank B. This bell crank is itself" connected by rock shaft band arm b1 (Fig. 4) to the *upper end of a substantially vertical rod' or link C, whose lower end is pivotally connected to a crank arm don the inner end of a rock shaft D which projects through and has its bearings in the base 1165 of the machine. is provided with a crank arma1 which is operatively connected toV an upwardly eX- tending rod or finger E,

so bent or disposed as to lie in the path of lmovement vof any one of a series of pins e and spaced upon'the frame 1568, the platen 1599 is journaled, Figs. 2 and 3. These pins e are spaced on such or paper support according to the different columnar positions to which the paper carriage is shifted, while the upper arranged end of the operating rod E in position to be contacted and depressed by any one of whose upper end is The outer'end of the rock shaft- D such pinsat any columnar position of the paper carriage. The said operating connections are Yheld in the position indicated in Fig2 with a yielding pressure by means of a springe connected with the link C, as indicated in Figs.l 1 and 2.

When the paper support or platen is in printing position, as indicated in Fig. 2, one of the series of pins e causes a depression of the operating rod E and a consequent pai'- tial rocking of the controlling shaft A, with the result that at this time the reduced side lof such shaft is presented toward the tails of the latches 717 without any contact or 1n-v terference therewith, so that' such latches and in fact the entire printing mechanism operates in the usual manner. When, however, the platen is tilted back as shown in Fig. 2, the downward pressure of one of the pins e is. removed from the tilting rod E,

v whereupon, owing tothe tension of the Vl String C, 'stored to the operating connections are '1ethelr normal condltion, whereupon rocked the controlling shaft A is partially tails of so as to prevent its fullside to the Vling said support the latchesi717 and to partially oscillate suchlatches, suiiiciently for the purpose of vdisengaging the same from the hammer drivers v 716. If the m'achineis now operated'for the taking of .a total orfor inserting an item into the machine, neither the drivers nor the hammers will be held under tension, inasmuch as the latches which constitute the trigger devices `for the drivers, have been disabled so that in the operation ofthe machine the hammers will move slowly in a rearward direction following the restoring bail while their sectors are moving upwardly, but such hammers will simply come to4 rest at the end of the forward stroke of the operating handle or forward movement of the main operating shaft,without delivering any blows upon the type plates. Thus, according to the present-embodiment of my invention, neither the drivers nor the hammers are put-,under that tension to which they are subjected in the ordinary operation of the printing mechanism, inasmuch as the drivers and hammers move rearwardly as the pawlsV 718 move forwardlyso that the sal the usual operations of the machine'. Im#

mediately upon restoring the platen to printing position the operating rod E is depressed and the interference to the latches 717 caused by the roclr shaft A is removed by partially y rocking such shaft to present the reduce side thereof to such latches@ The action of the printing mechanism is.

thus under the control of the paper carrier the printing mechanism shall operate or not.

`By thesemeans the danger of: knocking the type plates off the lsectors or injuring the connections between theseparts is prevent- I ed, inasmuch as no blow can be delivered by a hammer so long as thepaper support is not in printing position.

4although l have herein shown and described 'pins e as the part of the paper support which for tripping the latches, yet it will be understood that a longitudinal plate niay be substituted for the pins to act with the same efect and it will also be understood that it is within the scope andlmeaning of my invention to utilize any part or portion of the' paper support for'the purpose of controlmeans'. Furthermore, itwill be understood that I employ the term paper only the ordinarypaper support on a laterally movable paper carriage, but also a, paper support adapted merely to swing and not to move laterally or longitudinally.

While early release of hammersv and elimination thereby of percussive action platen 1s out of printing position, yet it is or platen, whose position determines whether actuates or controls the means 1.20 in its broad sense to include not t0 be understood that such control of the hammers can be availed of in other connect-ions where a non-printing action ot hammers is desired.

I claim:

1. ln an adding machine, the combination, with the printing mechanism and with a paper support movable to and from a posit-ion for receiving printing impact of said mechanisimbf means for preventing printing action .when the paper support is out of position for receiving the impression impact.

2. ln an adding machine, the 4combination, with the printing mechanism and with a paper support movable to and from a position for receiving'printing impact of said mechanism, of means under the control ot the paper support for preventing printing action when the paper support is out of position to. receive an impression troml thel printing mechanism. I

8. ln an ,adding machine, the combination, with the printing.mechanismv and with a movable paper support, of means tending to prevent printing action but rendered inoperative when the paper support is in position to receive an impression trom the printing mechanism.

4C. ln .an adding machine, the combination, with the printing-.mechanism and with a movable paper support, of means spring pressed to an operative position to prevent printing action but rendered inoperative whenthe paper support is in position to receive an impression from the printing mechanism.

7. lln anv adding machine, the combination, with the printing mechanism and with a paper support arranged to swingmt means normally tending to prevent printing action and rendered inoperative to permit printing action when the paper support is in printing position. l

. 8. ln an adding machine, the combination with the printing mechanism and with a paper support arranged to swing, of means normallj'vv tending to prevent printing action and having an operating member arranged in` the path of movement of the paper support and actuated thereby when the, sup-port noir-area is in. printing position-whereby said means are rendered inoperative.

9. lln an adding machine, the combination, with theprinting mechanism having hammers for causing the impression, and with a lpaper support forcontrolling the hammer action movable to and from a position for receiving the impression impact,

with provisionsfor automatically preventing impression action of hammers when the paper support is out of position to receive the impression impact.

10. ln an adding machine, the combination, with the printing mechanism having hammers for causing the impression, and Witha paper support, of means normally tending to prevent hammer actionand arranged 'to be rendered inoperative 'by the paper support when in printing position to permit the printing mechanism to operate.

.11.' ln au adding machine, the combination, with the printing mechanism having hammers for causing the impression, and with a paper support arranged to swing to and from position-for receiving the impression impact, of means governed hy the swinging of the paper support for controlling t-he hammer action,

12. ln an adding machine, t-he combination, with the printing lmechanism having hammers for causing the impression, and with a paper support arranged to swing, of means under the control of the paper support for preventing hammer action when f the paper. support is swung back :from the position at which it receives the impression.

13. ln 'an adding machine, the combination, with the printing mechanism having movabletypeand hammers for striking said type, and with a paper support arranged to swing, of means for controlling-the hammer action andarranged to prevent the striking ofthe type when the paper support is not in printing position.

14. ln an adding machine, the combination, withthe printing mechanism having movable type and hammers for striking Said type, and. with a paper support arranged to swing, of means under the control of the paper support for tripping the hammers upon the initial movement of the printing .mechanism to permit the hammers to move throughout the movement of the printing mechanism without striking the type.

15. ln an adding machine, the combination with the print-ing mechanism having movable type, hammers for striking said type and trigger ydevices controlling the hammers, of means under the control of the paper support for tripping the trigger devices upon the initial movement of the printing mechanism to prevent hammer action.

16. lin an adding machine, tne combinallt) tion, with the printing mechanism having movable type, hammers for strikingsaid type, drivers for such hammers, and tr1gger' devices controlling the drivers, and with a aper support arranged to swing, of means controlled by the paper support and adapted to render the trigger devices inoperative when the paper support is not in printing Y drivers for such hammers, latches normally restraining said drivers from movement, trips for the latches, and means controlled by the paper support and normally tending to trip saidlatches but rendered inoperative when the paper support is in printing position.

19. In an adding machine, the combination, with the movable paper support and with the printing mechanism having movable type, hammers for. striking said type, drivers for such hammers, latches normally restraining said drivers Jfrom movement,

trips for the latches, a movable member ar-- ranged to be actuated to trip said latches to prevent hammer action,.and `an arm connected with said member and arranged to be operated by the paper support.

20. In an adding machine, the combination, with the movable paper support and with theprinting mechanism having movable type, hammers for striking said type, drivers vfor such hammers, latches normally restraining said drivers from movement, trips for the latches, a movable member spring pressed toward a position to trip-said latches to prevent hammer action, and an arm connected-with said membervand contacted by the paper support when in printing position to operate such member and render it inoperative.

21. In an adding machine, the combination, with the movable paper support, and with the printing mechanism having movable type, hammers for striking said type,

drivers for such hammers, latches normally restraining said driverspfromA movement,

trips for the latches, a movable member spring pressed toward a position to trip said latches to preventv hammer` action, and an arm connected with said member and held in the path of movement of the paper support by said springpressure but arranged to be moved by such support when in prmting position to thereby render said member inoperative and permit of the normal operation ofthe printing mechanism.

22. In an adding machine, the combination, `with 'the movable paper support and with the printing mechanism having move able type, hammers for. striking said type, drivers for'such hammers, latches normally restraining said drivers from movement,

trips for the latches, a rock shaft having` portions to contact and thereby trip sai latches to prevent hammer action, and an arm operatively connected with said shaftv and project-ing in the-path of the paper,

support but actuated by the latter to rock the shaft to an inoperative position to which it is held so long as the paper support remains in printin position.

p 23. In an ad ing machine, the' combination, with the papersupport and with printing mechanism including the hammers and their trigger devices, of means under the control of the pa er support for releasing said trigger devices when the .paper support is moved from i printing position y comprising a member arranged to be moved to release the trigger devlces, and an oper- .v ating -connection between said member andv the paper support, including a movable rod or finger arranged in the path of the paper support and adapted to be movedthereby when the'paper support is in printing position to remove said member to an inoperative position.

` 24. In an adding machine, the combination, with the paper support and with printing mechanism including the hammers and their trigger devices, of means under the control of the paper support for releasing said trigger devices whenthe paper sup-g.

port is moved from printing position comprising a member arranged to be moved to release the trigger devices, and an operating connection between said member and the paper support including a movable rod or iinger projecting adjacent the paper ysupport, the latter having a series of pins corresponding with different columnar positions of the support and arranged to control and move said nger to thereby remove said member to an inoperativeh position.

25. In an adding machine, the combination, withthe paper support and with printing mechanismincluding the hammers and their trigger devices, of means under the control of the paper support for releasing said trigger devices when the paper sup- Y f v port is moved from printing position com-l prising a member arranged to be moved to release the trigger devices, and anv Operating connection between said member and the paper support, including a substantially vertical finger longitudinally movable, said paper support having a projecting portion iny which path of movement said finger is projected.

26. in an adding machine, the `combination, with the paper support and with printing mechanism including the hammers and their trigger devices, of means under the control of the paper support for releasing said trigger devices when the paper support is moved from printing position, comprising a rock shaft reduced on one side and arranged adjacent said trigger devices to release the latter When such shaft is rocked to present its full side thereto, a movable finger arranged in the path of swinging movement of the paper support, and operating connections between said tinger and the rock shaft,

27. in a machine of the character described, the combination of ercussive'printing means and meansfor e ecting at Will a gradual movement o such printing means.

28., ln a machine cat the character described, the combination of a spring-actuated printing hammer, means for retracting the same, means for holding the hammer retracted, tripping devices timed torelease the latter means for producing a percussive hammer action, and means foranticipating at Will the operation of said tripping device and producing gradual movement of the hammer following up its retracting means to the elimination of percussive action.

29. In a machine of the character described, the combination of hammer levers, springs applied thereto, an oscillating bail for retracting said levers, latches for restraining the levers, paWls for tripping the latches, an oscillating carrier for the pawls, and means for tripping the latches independently and in advance of the pawls to cause the levers to follow the bail and eliminate' percussive action..

CLARENCE (l MAPEL.

l/Vitnesses S. E. HIBBEN, LOUIs B. ERWIN. 

